How to Stop a Windshield Crack from Spreading?

Save Your Windshield and Drive Safely!
A driver's view of a cracked windshield from inside the car, highlighting visibility issues and safety concerns
Photo: TheDrive

A windshield crack can be a major inconvenience and even a safety hazard. In this guide, we’ll show you how to stop a windshield crack from spreading, so you can protect your investment and stay safe on the road. We’ll cover temporary and permanent solutions, as well as offer tips on preventing future cracks.


Windshield cracks can occur due to various reasons, such as flying debris, temperature fluctuations, or even stress from improper installation. Regardless of the cause, it’s crucial to address the issue promptly to prevent it from worsening. In some cases, a crack can expand, causing visibility issues and increasing the risk of shattering.

Temporary Solutions For a Windshield Crack

If you’re not able to address the crack immediately, no worries. Here are some temporary solutions to prevent it from spreading:

  1. Apply clear nail polish or super glue: Gently clean the area around the crack and apply a thin layer of clear nail polish or super glue. This will help stabilize the crack and prevent it from growing.
  2. Use a windshield repair kit: These kits typically include a resin and a tool to apply it. Follow the manufacturer’s instructions to fill the crack and prevent further damage. This is a great temporary solution until you can get professional help.
  3. Avoid extreme temperature fluctuations: Exposure to sudden temperature changes can cause the crack to expand. Try to park your car in a shaded area or garage, and avoid using the defrost setting on your windshield.
  4. Tape it up: While not the most attractive solution, applying clear packing tape over the crack can help keep dirt and moisture out and provide some stability.
Applying clear nail polish on a windshield crack as a temporary solution

Permanent Solutions For a Windshield Crack

To ensure the long-term integrity of your windshield, consider these permanent solutions:

  1. Professional windshield repair: In many cases, a professional can repair the crack using specialized tools and techniques. They’ll inject a resin into the crack, which will bond with the glass and restore its strength.
  2. Windshield replacement: If the crack is too large or deep, a complete windshield replacement may be necessary. This is especially true if the crack impairs your visibility or poses a safety risk.
A professional installing a new windshield on a car as a permanent solution to windshield cracks
Photo: Pinterest

Prevention Tips

While you can’t always avoid windshield cracks, there are steps you can take to minimize the risk:

  1. Maintain a safe distance from other vehicles: Following too closely can result in flying debris hitting your windshield. Keep a safe distance to reduce the chances of damage.
  2. Replace worn windshield wipers: Old or damaged wipers can scratch your windshield and weaken its integrity. Regularly check and replace your wipers as needed. Learn more about how long windshield wipers last.
  3. Avoid parking under trees or near construction sites: Falling branches or debris from construction sites can damage your windshield. Try to park in a safer location whenever possible.
  4. Regularly inspect your windshield: Check for chips, cracks, or other signs of damage. Addressing small issues early can prevent more significant problems down the road
  5. Invest in a windshield sunshade: Using a sunshade can help reduce temperature fluctuations inside your car and protect your windshield from direct sunlight.
  6. Schedule routine maintenance: Regularly check your vehicle for loose or damaged parts, like the trim or molding around the windshield. These issues can contribute to windshield cracks if left unaddressed.
A car windshield protected by a sunshade to reduce temperature fluctuations and prevent cracks


Knowing how to stop a windshield crack from spreading is crucial to ensure your safety and maintain your vehicle’s value. By implementing temporary solutions, seeking professional help for permanent repairs, and following prevention tips, you can protect your windshield and enjoy a safer driving experience. Remember, it’s always better to address small issues before they escalate into more significant problems.

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